On Friday midafternoon I ordered the Airfree P1000 and it arrived on Saturday . the very next day. Lightning delivery! I have an aviary which holds 10 Lovebirds, 3 Canaries and 3 Finches so you can imagine it might get a bit sniffy at times. Shortly after its arrival, I plugged in the P1000 in a room approximately 270 square feet and WITHIN 12 HOURS there was no odor - absolutely none. This is the best product ever. And as for Allen and Rena, they are fantastic to deal with. I can't speak well enough for them and their products. Elaine